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  1. jhenderson0107

    $30K Budget - On the quest for my "end game" speaker

    1. The Trinnov Altitude 16 includes TosLink optical and coax (four channels) outputs whose volume is controlled digitally. I convert these to AES via Hosa converters and drive the digital inputs of Genelec L, C, R in my home theater. 2. The RME Fs Pro and UCX II provide an AES output whose...
  2. jhenderson0107

    New mysterious Genelec monitors

    8381: too big. 8361: too small. 8371: just right.
  3. jhenderson0107

    Vintage and modern Vu-Meters, Oscilloscope, Spectrographs, etc.

    One of my favorite 'vintage' instruments - the HP 53310A modulation domain analyzer. It measures and displays amplitude vs frequency, rather than amplitude vs time like an oscilloscope. It's useful for jitter analysis, ISR latency, etc.
  4. jhenderson0107

    Does your house wiring supply enough power for your audio system?

    I like my coffee strong. I make sure to use all 15A when brewing... ;)
  5. jhenderson0107

    Looking for a home cinema preamp with a digital output

    I see requests similar to the OPs frequently on this forum. In my opinion, this is 'tilting at windmills'. There is a negligibly small, audibly imperceptible difference between driving studio monitors via their differential (XLR) analog vs digital inputs. I have an Altitude 16 driving the...
  6. jhenderson0107

    Does your house wiring supply enough power for your audio system?

    I added two 30A services for my home theater. Prior, attempts to brew coffee at the bar would occasionally trip the breaker and power down the theater rack.
  7. jhenderson0107

    RME ADI-2 DAC vs Pro for Genelec

    In my home theater, I use Genelec for the 7 bed layer driven by Altitude 16. Front LCR receive AES and remaining channels receive differential analog via XLR. In my experience, transparency of Genelecs fed via analog and digital are equivalent.
  8. jhenderson0107

    RME ADI-2 DAC vs Pro for Genelec

    The ADI-2 Pro FS ships with this cable, which exposes the AES output directly. Just use an XLR mic cable of suitable length to reach your first Genelec channel or sub, then another to daisy-chain to the next speaker in the chain. In my studio, I do this to connect my RME UCX II (which uses...
  9. jhenderson0107

    RME ADI-2 DAC vs Pro for Genelec

    This is reported to work fine on Macs, but requires a driver if used under Windows. Personally, I use a Topping D10b which performs usb->SPDIF and a Hosa CDL-313 to convert SPDIF to AES. I use an RME ADI-2 Pro FS on my living room rig to drive the AES input of a MiniDSP 4x10HD crossover into...
  10. jhenderson0107

    HQplayer - do I need it?

    Thanks for clarifying. I agree with you and apologize for replying out of context. In that specific case, synchronization would require that the recovered SPDIF clock be exposed to an external output (BNC) and used to drive to the master clock input on the USB DAC. If that capability is...
  11. jhenderson0107

    HQplayer - do I need it?

    The audio stream is either being sent to the audio interface via SPDIF or USB during any given session. Not both. If the former, then the clock recovered from the SPDIF data stream dictates the sample rate. If the latter, the internal clock of the interface dictates the sample rate. I've...
  12. jhenderson0107

    HQplayer - do I need it?

    Buffer under/overflow isn't an issue when using the SPDIF interface for the reason cited in my earlier post. Underflow/overflow isn't an issue when streaming to a USB audio interface because its internal sample clock is used to pace the DAC samples in that use case. The host need only provide...
  13. jhenderson0107

    HQplayer - do I need it?

    The data clock is recovered by any SPDIF receiver from the incoming signal. The recovered clock is used to pace sample playback; Consequently, the buffers will never under/overflow in a properly engineered receiver. The RME products (any many other well-engineered products) employ a PLL to...
  14. jhenderson0107

    HiFi Wireless System to play audio files from PC/NAS

    I run both Roon and Logitech Slimserver on a headless PC hosting ~1500 albums with ~23000 tracks. This relatively low-end PC is also used for numerous other tasks such as video surveillance and it is very responsive for audio server functionality. I've used Slimserver for over 10 years, only...
  15. jhenderson0107

    NC252MP (class D) vs. A250W4R (classAB) burst measurements into 4ohm//2.2uF load

    I've only been designing electronics for fourty-five years but have yet to be subject to that "law". I have seen many unexpected phenomenon in mechanical and electrical systems over that time. I choose to allocate precious R&D time and dollars only to those which affect the required...
  16. jhenderson0107

    NC252MP (class D) vs. A250W4R (classAB) burst measurements into 4ohm//2.2uF load

    Why is it a "substantial area of research" when virtually every loudspeaker is incapable of reproduction of such high (>60 kHz) ultrasonic frequencies? There is no evidence that such oscillation in class D amplifiers undermines the reliability of the amplifier nor the load to which it's...
  17. jhenderson0107

    NC252MP (class D) vs. A250W4R (classAB) burst measurements into 4ohm//2.2uF load

    I agree - one should never make a choice of power amplifier based on 5W/1kHz SINAD charts. Since the distortion in the electronics chain is ~1000 times lower than the speaker/room chain, there's no need to fret over streamer/preamp/dac/power amplifier SINAD charts!! Instead choose devices for...
  18. jhenderson0107

    NC252MP (class D) vs. A250W4R (classAB) burst measurements into 4ohm//2.2uF load

    Perhaps a 60 kHz oscillation is interesting from a scientific or purist perspective. But it’s is irrelevant from an engineering (practical) standpoint. Since the typical speaker load cannot respond to a 60 kHz stimulus, it is not relevant to the analysis of an audio amplifier. So, why measure...
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